Manufacturers

2" Orion UltraBlock Narrowband Eyepiece Filter

R2038

The 2" Orion UltraBlock Narrowband Telescope Filter is the filter for deep-sky observers located at highly light-polluted sites. Blocks all forms of light pollution — mercury vapor and sodium emission bands — while passing the critical hydrogen-beta and ionized oxygen wavelengths. With an UltraBlock telescope filter, emission and planetary nebulas "surface" from the washed out background sky. In dark skies, the UltraBlock also enhances the sky presence of a significant number of fainter deep-sky objects over unfiltered and wideband-filtered views.

The Orion UltraBlock is the ideal eyepiece filter for deep-sky observers located at highly light-polluted sites

Narrowband filter blocks all forms of light pollution

Enhances the presence of a significant number of fainter deep-sky objects